Apparatus for burning fuel



March 4, l 930.

W. C. COLEMAN APPARATUS FOR BURNING FUEL Filed Dec. 50, 1927 INVENTOR ATTORNEY thetop of the font, ,the air supply tube 3 Patented Mar. 4, 1930 UNITED TATES WI LIA PATENT,- OFFICE O. COLEMAN, OF ,VEIOHITA, KANSAS, ASSIGNOR '10 COLEMAN LAMP AND STOVE (30., OF WIOLHITA, KANSAS, A CORPORATION OF KANSAS ArrAnA'rus ron BURNING rum.

Application filed December 30, 1927. Serial No. 243,656.

This invention relates to a method and apparatus for controlling the flows of two.

10 receptacle above the liquid level. The air has an aifinity for the lighter ends of the hydrocarbon fuel, such as gasohne.

My invention contemplates a novel apparatus for carrying out the method of Initial- 15 1y utilizing the air as a preheating agent for the generator and cutting off the gaseous fuel or carbureted air by the heat of the burner as soon as the generator becomes hot enough to vaporize the liquid. According to my invention, the carbureted air will initlally iiow to the burner to the exclusion of the liquid, but so soon as there is enough heat generated by the burner to cause the generator to heat the liquid to vaporizing temperature, the carbureted air will cease to flow and thereafter the liquid will be forced into the generator by the pressure within the tank or receptacle.

In order to understand my invention, reference should be had to the accompanying drawings in which:

Fig. 1 is a fragmentary view of a lamp of known construction to which my invention 18 applied.

Fig. 2 is enlarged view of the air supplying tube, the generator and a thermostat for closing 0115 the carbureted a1r supply, the supporting bracket, being shown in section and Fig. 3 is an enlarged view of the air shutofi valve.

The font 1, the bracket fitting 2 screwed in supplying the atmosphere with the burner 4:, the mixing chamber 5, the burner supports 6, the burner or mantle 7, the generator 8, the filler plug9 and the pump 10 in a general way have all been used PIIOI to my invention. In such a lamp, the pressure of the air in the space 11 forces the liquid 12' up through the supply pipe 13 into the generator 8 so that-the needle valve controlled by the stem 14 can supply the proper amount of liquid to the generator to be vaporized before it enters the mixing chamber 5 to combine with the air supplied through pipe 3 to be used at the burner 7. I have shown the pipe 13 communicating with the generator 8 through a port 15. In addition, I have provided a carbureted air port 16 communicating with a perforate tube 17 in the air space 11. The tube 17 carries a wick 18 which, due to capillary attraction, will be saturated with liquid hydrocarbon. "The port 16 has a valve seat 19 for the valve 20 on a stem 21 surrounded by a stufling-box 22. The valve 20 issleeved on stem 21, provided with an enlargement or head 23 against which one end of a coil spring 24 abuts, the other end of the spring abutting against the bottom of the chamber 25 so as 'to act as a cushion when the stem 21 expands. The advantage of this is that the valve will not be jammed too hard against the valve seat. The valve stem 21 is anchored at 26 to the mixing chamber and adjacent to the burner 7 of which there are usually two to a lamp.

Assuming that the valve in the generato I is closed; that there is gasoline or other appropriate liquid fuel in the tank 1 under pres- .intense heat which will not only heat the generator 8 but also the valve stem 21 which is of expansible material so that it will grow or expand longitudinally causing the valve 20 to seat upon the seat 19, closing off the air supply through port 16 while the port 15 remains open. The pressure of the air. in chamher 11 will now become eifective to force liquid fuel into the generator and since the generator is heated, the liquid will be fed into the chamberin the form of vapor ing being sufficient to force the liquid into the .generator 8. If the burner should blow out or become extinguished, the thermostat 21 will cool, then the spring will unseat the valve allowing the air pressure to exhaust through the open generator. Hence danger. of the pressure forcing raw liquid out through the burner or burners will be eliminated.

It will be seen that a lamp constructed in accordance with my invention will enable the operator to immediately ignite the fuel at the burners without any preheater and that onlyv so much pressure will be lost as is represented by the amount of carbureted air required to 7 heat the generator to vaporizing temperature. v k

What I claim and desire to secure by LettersPatent is space under pressure, a fitting in the wall of the font having a main passage-way, an air port communicating the air space with the main passage-way and a liquid port communicating the liquid space with the main passage-way, a burner above the fitting, a valved vaporizing generator communicating with the main passage-way for supplying vaporized fuel to the burner, a part of the generator being adjacent to the burner, and a thermostatic valve normally unseated but movable into closing position in response to heat from the burner to closethe air port so that thereafter only liquid will flow to the generator due to the pressure of air in the air space above the liquid.

In testimony whereof I aflix my signature.

WILLIAM G. COLEMAN.

1. In a device of the class described, a

font having a liquid space and an air space above the same to contain liquid fuel under pressure, a fitting in the wall of the font havmg a main port and two branch ports, one of which admits air to the main port and the other of which admits liquid to the main port,

communicating the an' air. tube carried by the fitting, a mixing chamber at the top of the air tube, a burner carried by the mixingchamber, a valved generator communicatingt-he main port with the mixing chamber, and a thermostatic valve for the air branch port responsive to heat from the burnerto close'the airport branch only under, action of heat from the burner. 2. In a device of the class described, a

font having a liquid space and an air space fitting in the wall of the font having aifuel passageway-provided with an air branch port andv a liquid fuel branch port space'aniwith the liquid in the font,-a vapor generator communicating with the, passagea valve for controlling the way iii-the fitting, same, and a'"thermostatic valve normally unseated to permit air to flow from the air space through the passage-way into the generator, said valve operating under the action of heat to close the air branch port to thereafter permit liquid only to flow to the generator through the passage-way in the plug.

3. In a device of the class described, a font having a liquid space and an air space above it, means for introducing air into the air passage-way the air: 

